Can't say I agree with your timings Never Modern. It simply isn't going to be possible to get to LB (and I'm talking about gettting to street level at LB) via the ELL in only eight minutes longer than a direct train. I've tested this out by getting off at NXG and using this method. You also spend 50% of the journey running up and down escalators and stairs at LB and CW - and trying to stuff yourself onto tightly packed Jubilee Line trains during the rush hour at CW.

Who on earth is going to choose this method of getting to LB when there are direct trains?

You say you are more concerned about direct trains to Victoria and CX and that the cuts to LB services are of less concern. Unfortunately, you simply cannot divorce one from the other. The loop line trains are the very ones that are likely to be cut to reduce the number of trains by two per hour.